| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [to-vb] hard at | 21 |
|
| 2 | have [to-vb] hard at | 10 |
|
| 3 | [vb past] [to-vb] hard at | 7 |
|
| 4 | [to-vb] hard at [art] | 10 |
|
| 5 | [to-vb] hard at [art] | 10 |
|
| 6 | [to-vb] hard at a | 5 |
|
| 7 | [to-vb] hard at [pron] | 5 |
|
| 8 | [to-vb] hard at the | 5 |
|
| 9 | [to-vb] hard at a | 5 |
|
| 10 | [to-vb] hard at [v-ing] | 5 |
|
| 11 | [to-vb] hard at [verb] | 5 |
|
| 12 | [to-vb] hard at the | 5 |
|
